Questions and answers on pumps and pumping machinery (1912)
Wakeman, William Henry, 1855- [from old catalog] · Chicago, The Joseph G. Branch publishing company · leaf 123
tD DDL 112 QUESTIONS AND ANSWERS ON EL* … PUMPS AND PUMPING MACHINERY. 113 403. Q. What advantage is gained by this de-sign? A. The number of times that motion is reversedis less for a given piston speed per minute. 404. Q. Why is this desirable? A. The shocks and jars and much of the wear ona pump is caused by the reversal of motion at…
Pumping machinery
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